830248 ÷ 21 
Our goal is to divide 830248 by 21.

Advancing to step 1:
If we divide 8 by 21, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 21

Going ahead to step 2:
When dividing 83 by 21, we get 3 with a remainder of 20.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 63 away from 83, we end up with 20.
Fetch the next digit (0) from the dividend, attach it to 20 and continue: 200 / 21

Let's proceed to step 3:
21 can be fit into 200 9 times, resulting in a remainder of 11.
The next digit of our result is 9. 
Result so far: 39.0
Deduct 189 from 200 and we're left with 11.
Grab the next digit (2) from the dividend, add it to 11, then carry on: 112 / 21

Moving on to step 4:
21 can be fit into 112 5 times, resulting in a remainder of 7.
The next digit of our result is 5. 
Result so far: 395.0
Subtract 105 from 112 to get 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 21

Moving on to step 5:
21 goes into 74 3 times with a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 3953.0
Subtracting 63 from 74 leaves us with 11.
Append the next digit (8) from the dividend to 11 and continue with: 118 / 21

Let's proceed to step 6:
21 can be fit into 118 5 times, resulting in a remainder of 13.
The next digit of our result is 5. 
Result so far: 39535.0
Subtract 105 from 118 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 7:
When dividing 130 by 21, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 39535.6
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 8:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 39535.61
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 9:
The number 21 fits into 190 9 times, leaving a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 39535.619
Subtracting 189 from 190 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 10:
When dividing 10 by 21, we get 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 39535.619
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 11:
100 divided by 21 is 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 39535.61904
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 12:
21 goes into 160 7 times with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 39535.619047
If we subtract 147 from 160, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 13:
If we divide 130 by 21, we get 6 and a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 39535.6190476
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 14:
40 divided by 21 is 1 with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 39535.61904761
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The quotient of the division is 39535.61904761, and the remainder is 1.9e-08.